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2. Electrical
Refer to section: 'Important Safety Information' rst.
2.1 In a domestic installation, the rating of the electricity supplier’s fuse and the
consumer unit must be adequate for the additional demand. All Mira Advance
ATL electric showers are high power appliances. Voltage drop due to local
heavy demand will reduce the shower’s performance.
2.2 The appliance must be earthed by connecting the supply-cable earth conductor
to the earth terminal.
Any supplementary bonding and supply cable size must conform to BS 7671.
2.3 As a guide only, and in accordance with BS 7671 we recommend close circuit
protection:
i.e. 9.0 kW = 40 Amp
9.8 kW = 45 Amp
In accordance with BS 7671, a 30 mA Residual Current Device (RCD) MUST
be included in the electrical circuit. This may be part of the consumer unit or a
separate unit.
A separate, permanently connected supply must taken from the consumer
unit to the appliance through a double-pole switch, which has at least 3 mm
contact separation. The switch can be a ceiling mounted pullcord type within
the shower room or a wall mounted switch in the applicable zone area.
2.4 DO NOT exert strain on the terminal block. Make sure that the electrical
connections are tightly screwed down.
2.5 DO NOT turn on the electrical supply until the plumbing has been completed.
2.6 Unless otherwise stated, electrical equipment such as extractor fans, pumps
must not be connected via this product.
1.9 The position of the shower and shower ttings must provide a minimum gap of
25 mm between the showerhead and the spill over level of any bath, shower
tray or basin and a minimum gap of 30 mm between the showerhead and the
spill over level of any toilet, bidet or other appliance with a Fluid Category 5
backow risk.
Note! There will be occasions when the hose retaining ring will not provide a suitable
solution for Fluid Category 3 installations, in these instances an outlet double
checkvalve must be tted, this will increase the required supply pressure typically by
10kPa (0.1 bar). Double checkvalves tted in the inlet supply to the appliance cause
a pressure build up, which affect the maximum static inlet pressure for the appliance
and must not be tted. For Fluid category 5 double checkvalves are not suitable.
1.10 Wall xings are supplied for solid wall structures. For other wall structures such
as panels alternative xings may be required. A minimum of 2 xing screws
must be used.
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